Klank is the stage name for industrial/metal musician Daren Diolosa, former guitarist of Circle of Dust, as well as the name for his band. He is somewhat notorious for signing his contract with Tooth & Nail in his own blood.

Still Suffering featured production and programming by Klay Scott, (Circle of Dust, Celldweller, Angeldust) and Buka of Argyle Park contributed guest lyrics and vocals. The music was very similar to the industrial metal and industrial rock stylings of Circle of Dust, with the first four songs on the album originally having been written for Circle of Dust. Klank cited death metal and groove metal bands Fear Factory and Machine Head as influences. The album's lyrics bluntly discussed real life issues such as child abuse, betrayal, and religious doubt.

The single "Downside", released on Tooth & Nail's first Songs from the Penalty Box compilation, was released as a remix EP with several remixes done by Albert. Additionally, Klank recorded a cover of Stryper's "The Way" in 1996 for a tribute album released by Flying Tart Records. Klank performed at several Cornerstone Festivals during the mid- and late 1990s. The touring lineup at the time consisted of guitarists Mike Nicosia and Carl Weaver and drummer Eric Wilkins, formerly of rapcore group Every Day Life (EDL).

Diolosa released the album Numb in 1999 through his own label SmokeDogg Productions. Numb showed Klank's versatility and melodic sensibilities, and the band dubbed their new style as "Dancy Aggressive Dark Electronically Influenced Groove". Numb did quite well for an independent release, and it was eventually re-released by Progressive Arts Media in 2000 with an altered track listing. The video for the first single off the album, "Blind", appeared on MuchMusic.

Klank appeared as a guest on a couple of albums that same year. He contributed lead vocals to the song "Silhouette of Rage" on the sophomore Argyle Park/AP2 album Suspension of Disbelief, and also lent lead vocals to the song "So Alive" by 54, a synthpop side project of Klank's band.

After the release of Numb, band members took a hiatus to start families and explore other musical ventures. Klank began working with Ringling Brothers Circus as a transportation manager and show welder and steel fabricator. Diolosa continued recording material over the years, and stockpiled more than 100 songs. In July 2007, Klank played a surprise show at the at Cornerstone Festival in Bushnell, Illinois and concurrently released a new EP, titled In Memory Of ..., which collected a few rarities from Klank's earlier years as well as six new songs.

NUMB...Reborn was released on April 20, 2010. It consisted of 15 tracks which included 3 remixes and guest appearances from Jim Chaffin, Larry Farkas and Mike Phillips. NUMB...Reborn finds KLANK returning to their roots with a straight up, guitar driven, aggressively heavy release. Songs like Don't Count Me Out, Blind, D.F.L. and The Rules are a few examples of the raw heaviness and aggression, while songs like Broken, God? and So Very Real gives the bands melodic side a chance to shine through.